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CIFS/SMB permission denied after domain migration due to missing UNIX group in ONTAP

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Category:
ontap-9
Specialty:
nas
Last Updated:

Applies to

  • ONTAP 9
  • CIFS/SMB

Issue

  • During a planned SAP production migration (2025-10-18 to 2025-10-21), users were unable to write to the CIFS share /sacgisprod/gis_prod after migrating to a new domain.UNIX users had full permissions via name-mapping, but write access to the share failed.Error messages included “permission denied” on the client side and the following events in ONTAP logs:

[ULS-OP-NETAPP-D-01:secd:secd.unexpectedFailure:error]: Unexpected SecD failure in Vserver “ULSSVMLEVIP01d”. Details: Error: Validate the Ldap configuration procedure failed…[172] Hostname found in Name Service Negative Cache [172] Hostname lookup failed with error: Name does not resolve …
[2209] TCP connection to ip 10.4.40.61, port 389 failed: Operation timed out.
[2209] Unable to start TLS: Can’t contact LDAP server
[2209] Unable to connect to LDAP (NIS & NameMapping) service on uim-ap-dca60.ad.shared
[4249] TCP connection to ip 10.4.40.124, port 389 failed: Operation timed out.
[8331] TCP connection to ip 10.40.36.35, port 389 failed: Operation timed out.
[8331] Unable to make a connection (LDAP (NIS…

  • Packet trace analysis showed access denied packets with UID/GID 0.
  • Adding the name-mapped user directly to the ACL on a subset of directories restored write access.
  • Only default UNIX groups existed locally in ONTAP; group lookups were set to “files” in ns-switch.
  • Outage impacted the production SAP environment during a critical migration window.

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